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Chapter 2: The Invention That Changed Everything — Kerry Sachs and the 95% Efficient Biomass Furnace
Kerry sachs biomass furnace Low acid coffee Puroast Puroast engineering Science of coffee chapter 2 Traditional roasting

Chapter 2: The Invention That Changed Everything — Kerry Sachs and the 95% Efficient Biomass Furnace

Chapter 2: Kerry Sachs and the 95% efficient biomass furnace — the engineering innovation that made traditional low acid roasting viable at commercial scale.

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